In the meantime I have learnt that the version I need is apparently 3.2.2 and that Avenza does not recommend to download .apk from the internet. However I cannot not update my Samsung Galaxy S4 mini higher than 4.4.2 and would not like to loose all the maps I have purchased. Neither can I afford to buy a new smartphone just because one app is no longer compatible.
Unfortunately, we no longer support version 3.2.2 for Android OS 4. Avenza Maps 3.6 is compatible with Android 6.0 and higher. If your device is not running Android 6.0 (or newer) or is not able to update to OS 6.0 or newer then you will be unable to download the app from the Google Play Store.
If you have purchased maps on the Avenza Map Store, you would not lose them as they are saved to your Map Store account and can be easily downloaded onto a new device from your Purchase History. If you need any help with this in the future, please do not hesitate to reach out to us at help.avenza.com.